Added secure password storage using flutter_secure_storage

android/gradle/wrapper/gradle-wrapper.properties

@@ -2,4 +2,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.0-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.3-all.zip

lib/main.dart

@@ -105,3 +105,78 @@ class UhlLink extends StatelessWidget {
     );
   }
 }
+import 'package:flutter/material.dart';
+import 'secure_storage.dart';
+
+void main() {
+  runApp(MyApp());
+}
+
+class MyApp extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      title: 'Secure Password Store',
+      theme: ThemeData(primarySwatch: Colors.blue),
+      home: PasswordScreen(),
+    );
+  }
+}
+
+class PasswordScreen extends StatefulWidget {
+  @override
+  _PasswordScreenState createState() => _PasswordScreenState();
+}
+
+class _PasswordScreenState extends State<PasswordScreen> {
+  final TextEditingController _controller = TextEditingController();
+  final SecureStorage _secureStorage = SecureStorage();
+  String _retrievedPassword = "No password stored";
+
+  void _savePassword() async {
+    await _secureStorage.savePassword(_controller.text);
+    _controller.clear();
+    setState(() {
+      _retrievedPassword = "Password Saved!";
+    });
+  }
+
+  void _getPassword() async {
+    String? password = await _secureStorage.getPassword();
+    setState(() {
+      _retrievedPassword = password ?? "No password found";
+    });
+  }
+
+  void _deletePassword() async {
+    await _secureStorage.deletePassword();
+    setState(() {
+      _retrievedPassword = "Password deleted!";
+    });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Scaffold(
+      appBar: AppBar(title: Text("Secure Password Store")),
+      body: Padding(
+        padding: const EdgeInsets.all(16.0),
+        child: Column(
+          children: [
+            TextField(
+              controller: _controller,
+              decoration: InputDecoration(labelText: "Enter Password"),
+              obscureText: true,
+            ),
+            SizedBox(height: 20),
+            ElevatedButton(onPressed: _savePassword, child: Text("Save Password")),
+            ElevatedButton(onPressed: _getPassword, child: Text("Retrieve Password")),
+            ElevatedButton(onPressed: _deletePassword, child: Text("Delete Password")),
+            SizedBox(height: 20),
+            Text(_retrievedPassword, style: TextStyle(fontSize: 18)),
+          ],
+        ),
+      ),
+    );
+  }
+}

lib/secure_storage.dart

@@ -0,0 +1,30 @@
+import 'package:flutter_secure_storage/flutter_secure_storage.dart';
+import 'package:crypt/crypt.dart';
+
+class SecureStorage {
+  final FlutterSecureStorage _storage = const FlutterSecureStorage();
+
+  // Hash password before saving
+  String hashPassword(String password) {
+    return Crypt.sha256(password, salt: 'random_salt').toString();
+  }
+
+  // Save password securely
+  Future<void> savePassword(String password) async {
+    String hashedPassword = hashPassword(password);
+    await _storage.write(key: 'password', value: hashedPassword);
+  }
+
+  // Retrieve password
+  Future<String?> getPassword() async {
+    return await _storage.read(key: 'password');
+  }
+
+  // Delete password
+  Future<void> deletePassword() async {
+    await _storage.delete(key: 'password');
+  }
+}
+
+
+

pubspec.lock

@@ -122,26 +122,26 @@ packages:
     dependency: transitive
     description:
       name: build_daemon
-      sha256: "294a2edaf4814a378725bfe6358210196f5ea37af89ecd81bfa32960113d4948"
+      sha256: "8e928697a82be082206edb0b9c99c5a4ad6bc31c9e9b8b2f291ae65cd4a25daa"
       url: "https://pub.dev"
     source: hosted
-    version: "4.0.3"
+    version: "4.0.4"
   build_resolvers:
     dependency: transitive
     description:
       name: build_resolvers
-      sha256: "99d3980049739a985cf9b21f30881f46db3ebc62c5b8d5e60e27440876b1ba1e"
+      sha256: b9e4fda21d846e192628e7a4f6deda6888c36b5b69ba02ff291a01fd529140f0
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.3"
+    version: "2.4.4"
   build_runner:
     dependency: transitive
     description:
       name: build_runner
-      sha256: "74691599a5bc750dc96a6b4bfd48f7d9d66453eab04c7f4063134800d6a5c573"
+      sha256: "058fe9dce1de7d69c4b84fada934df3e0153dd000758c4d65964d0166779aa99"
       url: "https://pub.dev"
     source: hosted
-    version: "2.4.14"
+    version: "2.4.15"
   build_runner_core:
     dependency: transitive
     description:
@@ -314,10 +314,10 @@ packages:
     dependency: transitive
     description:
       name: device_info_plus
-      sha256: e3fc9a65820fef83035af8ee8c09004a719d5d1d54e6de978fcb0d84bbeb241a
+      sha256: "72d146c6d7098689ff5c5f66bcf593ac11efc530095385356e131070333e64da"
       url: "https://pub.dev"
     source: hosted
-    version: "11.2.2"
+    version: "11.3.0"
   device_info_plus_platform_interface:
     dependency: transitive
     description:
@@ -447,18 +447,18 @@ packages:
     dependency: "direct main"
     description:
       name: flutter_launcher_icons
-      sha256: "526faf84284b86a4cb36d20a5e45147747b7563d921373d4ee0559c54fcdbcea"
+      sha256: bfa04787c85d80ecb3f8777bde5fc10c3de809240c48fa061a2c2bf15ea5211c
       url: "https://pub.dev"
     source: hosted
-    version: "0.13.1"
+    version: "0.14.3"
   flutter_lints:
     dependency: "direct main"
     description:
       name: flutter_lints
-      sha256: "3f41d009ba7172d5ff9be5f6e6e6abb4300e263aab8866d2a0842ed2a70f8f0c"
+      sha256: "5398f14efa795ffb7a33e9b6a08798b26a180edac4ad7db3f231e40f82ce11e1"
       url: "https://pub.dev"
     source: hosted
-    version: "4.0.0"
+    version: "5.0.0"
   flutter_native_splash:
     dependency: "direct main"
     description:
@@ -537,10 +537,10 @@ packages:
     dependency: "direct main"
     description:
       name: fluttertoast
-      sha256: "8971efe7e59585e9149052e33718d84bca51e806f063d1467622b3dcb2878b6c"
+      sha256: "25e51620424d92d3db3832464774a6143b5053f15e382d8ffbfd40b6e795dcf1"
       url: "https://pub.dev"
     source: hosted
-    version: "8.2.11"
+    version: "8.2.12"
   frontend_server_client:
     dependency: transitive
     description:
@@ -569,10 +569,10 @@ packages:
     dependency: "direct main"
     description:
       name: go_router
-      sha256: b465e99ce64ba75e61c8c0ce3d87b66d8ac07f0b35d0a7e0263fcfc10f99e836
+      sha256: "04539267a740931c6d4479a10d466717ca5901c6fdfd3fcda09391bbb8ebd651"
       url: "https://pub.dev"
     source: hosted
-    version: "13.2.5"
+    version: "14.8.0"
   graphs:
     dependency: transitive
     description:
@@ -753,10 +753,10 @@ packages:
     dependency: transitive
     description:
       name: lints
-      sha256: "976c774dd944a42e83e2467f4cc670daef7eed6295b10b36ae8c85bcbf828235"
+      sha256: c35bb79562d980e9a453fc715854e1ed39e24e7d0297a880ef54e17f9874a9d7
       url: "https://pub.dev"
     source: hosted
-    version: "4.0.0"
+    version: "5.1.1"
   logging:
     dependency: transitive
     description:
@@ -1097,10 +1097,10 @@ packages:
     dependency: transitive
     description:
       name: shelf_web_socket
-      sha256: cc36c297b52866d203dbf9332263c94becc2fe0ceaa9681d07b6ef9807023b67
+      sha256: "3632775c8e90d6c9712f883e633716432a27758216dfb61bd86a8321c0580925"
       url: "https://pub.dev"
     source: hosted
-    version: "2.0.1"
+    version: "3.0.0"
   simple_animations:
     dependency: "direct main"
     description:
@@ -1222,66 +1222,66 @@ packages:
     dependency: "direct main"
     description:
       name: syncfusion_flutter_core
-      sha256: "3c1876b0a245de23de3b17a19e3106fed57d88f4fd2c8dc9bc1976705b1c31d5"
+      sha256: dafeebdf8673d6dd874191bf579bc17c76b4b84e09fc0e4ae5bc7e56c0c91f4b
       url: "https://pub.dev"
     source: hosted
-    version: "28.2.4"
+    version: "28.2.5"
   syncfusion_flutter_pdf:
     dependency: transitive
     description:
       name: syncfusion_flutter_pdf
-      sha256: f89aea01d60ed11801aad5067705070b01250a909369e0d2dc5d4bd0292a9b46
+      sha256: "50d8144ddc7b58b3450b4410bc8f7c456dc89d494c2270a3e294fb7ac9d7fb58"
       url: "https://pub.dev"
     source: hosted
-    version: "28.2.4"
+    version: "28.2.5"
   syncfusion_flutter_pdfviewer:
     dependency: "direct main"
     description:
       name: syncfusion_flutter_pdfviewer
-      sha256: "792f70be12f633982a2a0fc0dba725250c425e4ac630c48fa13591e68c3b6cd5"
+      sha256: "171024482a426a80598fe8d46991c7a8b88dd52570057619717262e4b8439c1c"
       url: "https://pub.dev"
     source: hosted
-    version: "28.2.4"
+    version: "28.2.5"
   syncfusion_flutter_signaturepad:
     dependency: transitive
     description:
       name: syncfusion_flutter_signaturepad
-      sha256: "447143026fa013f822abb61dc6b1c7942940043885ccb39c20bbb35a80c639fc"
+      sha256: "193e83e1c28207f2af20b1722e127997b135da00fffffd1bef3e8e65a25ed47e"
       url: "https://pub.dev"
     source: hosted
-    version: "28.2.4"
+    version: "28.2.5"
   syncfusion_pdfviewer_macos:
     dependency: transitive
     description:
       name: syncfusion_pdfviewer_macos
-      sha256: bfa1371edf9ef1b0191ec8799e0d87f04149d1d1c81722a563a911c0c5c05567
+      sha256: "0ade61a351b3013b992d352b408e9555bc7a54a6ded8a5117215f1376041eedc"
       url: "https://pub.dev"
     source: hosted
-    version: "28.2.4"
+    version: "28.2.5"
   syncfusion_pdfviewer_platform_interface:
     dependency: transitive
     description:
       name: syncfusion_pdfviewer_platform_interface
-      sha256: "827b0e9d780d16c89de113f2d741de86b156f77e572966a95975a5990b89e2df"
+      sha256: de14eb1221036394da09885ffe6cd3cafaaeabecfe29c692735cd881cbd3c43a
       url: "https://pub.dev"
     source: hosted
-    version: "28.2.4"
+    version: "28.2.5"
   syncfusion_pdfviewer_web:
     dependency: transitive
     description:
       name: syncfusion_pdfviewer_web
-      sha256: "310da263e447be7f4e091927b92976a9ccf2be1cb67b8d1467f426a5e68f77c3"
+      sha256: db54fb6da8b9a6f2c6df716ed490665396c7ce81a1e145458f409356c6b401be
       url: "https://pub.dev"
     source: hosted
-    version: "28.2.4"
+    version: "28.2.5"
   syncfusion_pdfviewer_windows:
     dependency: transitive
     description:
       name: syncfusion_pdfviewer_windows
-      sha256: bca461aeac6e0d30980907970e15ce960aa558877196a2cdced890133eefa611
+      sha256: "4ebd2ff8f250737f97fa60f2033f2b03368662c7d9f3dbe561b3c0c1df86cc3d"
       url: "https://pub.dev"
     source: hosted
-    version: "28.2.4"
+    version: "28.2.5"
   synchronized:
     dependency: transitive
     description:

pubspec.yaml

@@ -30,16 +30,20 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  flutter_secure_storage: ^9.0.0   # Secure encrypted storage
+  crypt: ^4.0.1                     # Hashing passwords
+  local_auth: ^2.1.6                 # Optional: Biometric authentication
+
 
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.8
-  flutter_lints: ^4.0.0
-  go_router: ^13.1.0
+  flutter_lints: ^5.0.0
+  go_router: ^14.8.0
   flutter_native_splash: ^2.4.0
   intl: ^0.19.0
-  flutter_launcher_icons: ^0.13.1
+  flutter_launcher_icons: ^0.14.3
   simple_animations: ^5.1.0
   carousel_slider: ^5.0.0
   smooth_page_indicator: ^1.1.0
@@ -90,7 +94,7 @@ flutter:
   assets:
     - assets/images/
     - assets/pdf/
-    - institute.env
+    - assets/institute.env
     - assets/cafeteria.json
   #   - images/a_dot_ham.jpeg